HP Moonshot 1500 Chassis User Manual Page 10

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Table 3 SEL event records (continued)
DescriptionFieldByte
Event type
Type of trigger for the event, such as, a critical threshold going high or state asserted.
Also indicates class of the event. Example: discrete, threshold, or OEM. The event
type field is encoded using the event/reading type code.
Event request message, event data field contents.Event data 114
Event request message, event data field contents.Event data 215
Event request message, event data field contents.Event data 316
1
The MC must accept Platform Event request messages that are in IPMI v1.0 format (EvM Rev=03h) and log them as IPMI
v1.5/v2.0 records by setting the EVMRev field to 04h and setting the channel number in the generator ID field
appropriately for the channel that received the event.
SDR repository
With IPMI’s extensibility and scalability each platform implementation can have a different
population of management controllers and sensors, and different event generation capabilities.
IPMI allows system management software to retrieve information from the platform and automatically
configure itself to the platform’s capabilities, enabling the use of plug and play, platform-independent
instrumentation software.
Information that describes the platform management capabilities is provided via two mechanisms:
Capability commands — these are commands within the IPMI command set that return
information on other commands and functions that the controller can handle.
SDRs these contain information about the type and number of sensors in the platform, sensor
threshold support, event generation capabilities, and sensor type readings.
The primary purpose of SDRs is to describe the sensor configuration of the platform management
subsystem to system software. SDRs also include records describing the number and type of devices
connected to the system’s IPMB, records that describe the location and type of FRU Devices (devices
that contain field replaceable unit information).
SDRs are kept in a single, centralized, non-volatile storage area managed by the MC. This storage
area is the SDR repository. In Moonshot, the SDRR is kept by the zone manager; the remaining
controllers have device SDRs. Additional device SDRs are kept at the cartridge and system node
level. All SDR repositories provide a mechanism for information to be obtained independently from
the controller by the BIOS system management or remote management.
SDR formats
The general SDR format consists of three major components: the record header, record key fields,
and the record body. To save space, sensors that only generate events do not require SDRs, in
addition, generic system management software does not access sensors unless they are reported
by SDRs.
10 Introduction and key concepts
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